Wouldn't hurt to try R-09 internal mics to see if this works well enough for requirements. If finding this too noisy, or handling noise of deck using the internal mics is too awkward or wanting a mic with wind noise protection, then external preamp/mic into R-09 will certainly work for most critical of requirements.
I do have an available upgrade solution with small external preamplifier for using your choice of regular handheld interview mic having a windscreen, or HRTF DSM baffled headworn type mic with windscreen for highest quality stereo-surround recording of voice and surrounding ambient to consider.
Daylight OLED screen invisibility is a concern that is not easily fixed using the internal mics, but with deck inside special 'daylight viewcase' I've found, seeing the screen is not a problem.
See review of R-09 with viewcase and links to external preamp/DSM mics at:
www.sonicstudios.com/r-09revw.htm.